Based on the blog post found here.
Checkout the spec directory to see how this project has setup turnip.
Running rspec will yield the output:
➜ turnip-example git:(master) ✗ rspec --format=doc
Creating An Account
Given I visit the page "/users/sign_up" -> When I fill in the form with: -> And I click the "Sign up" button -> Then I have created an account
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1 example, 0 failures